Improvement in extension-table slides



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S.B .'ALEXAND ER. EXTENSION-TABLE SLIDES.

Patented Obi. 17, 1876.

' and its leader attached thereto.

UNITED-"ESTATES;

PATENT OFFICE.

TO EZRA P.

WRIGHT AND'JUSTUS V. ELSTER.

IMPROVEMENT IN EXTENSION-TABLE. SLIDES.

Specification forming part of Letters Patent No. 183,276, dated October17, 1876; application filed September 12, 1876.

To all whom it may concern Be it known that I, SAMUEL B. ALEXAN- DER, ofthe city of Springfield, county of Clarke, and State of Ohio, haveinvented certain new and useful Improvements in Extension-Table Slides,of which the following is a full, clear, exact, and concisespecification:

My improvement relates particularly to the tongue of the slide, the samebeing divided My extension-table slide is tongued and grooved in theusual dovetailed form, the sectional tongue being made solid and smallerthan the groove, and glued into one of the slides, so as to be used as aleader for the improved elastic tongue, which is placed just behind itin introducing it into its groove; the elastic tongue, which is the partembracing my improvement, being wider than the groove, from theexpansion of the spring between its sections. Its introduction isfacilitated by the use of the solid fixed ton gue-piece in advance ofit.

Figure 1, Sheet 1, is an isometric view of a half set of slides with myimprovement. Fig. 2, Sheet 1, is a view of an end section of the maleslide with my improved elastic tongue Fig. 3, Sheet 1, is across-section, through line at w of Fig. 2, including, also, thecontiguous slide, with the elastic tongue in position for operation.Fig. 1, Sheet 2, is an end view of a male slide with my improved elastictongue, with a coiled or spiral metallic spring (as an equivalent) andits leader attached thereto. Fig. 2, Sheet 2, is a view of my improvedelastic tongue detached, with a bent segmental ribbon-steel .spring (asan equivalent) interposed between its two opposite sections. Fig. 2,Sheet 2, is a. view of the lower section b (as shown in .Fig. 2) fromthe inside, showing an elevation of its spring.

A A are the slides, which are grooved, in the usual dovetailed form,with grooves 0t. a and b are the two sections of my improved elastictongue, which is equally divided horizontally, for the introduction ofan elastic spring, which may be made of rubber or other material havingsufficient elasticity to keep the two sections of the tongue apart farenough to cause the sides of the tongue to hug the walls of the grooveclosely as it slides back and forth in it in opening and closing theslides.

In Fig. 2, Sheet 1, a cylindrical piece of rubber, 0, is introducedbetween them, the two sections a and I) being grooved laterally acrosstheir inner sides to receive it.

The upper section a of the tongue is movable, and the lower section b isglued fast in the lower side of the groove a.

A solid tongue-piece, d, slightly smaller than the elastic tongue, isfastened in the end of the groove, in advance of it, to facilitate itsintroduction when the slides are joined together, as shown in Figs. 1and 3, Sheet 1.

The manner in which the elastic tongue in my improved slide isconstructed allows of any lateral or up-and-down movement in operatingthe slides without affecting their status, as it presses the sides ofthe groove closely,

and by its elasticity takes up all lost motion.

Instead of the pressure of the spring being exerted toward an angle ofthe groove only, as in some slides, the pressure of the upper loosesection a is toward the top of the groove in both of the joined slides.(See Fig. 3, Sheet 1.)

I claim as my improvement- 1'. An elastic tongue for extension-tableslides, constructed in two separate pieces, being horizontally divided,and a spring of rubber, or its equivalent, interposed between them, asshown and specified, for the purpose set forth.

2. In combination with sections a and b and spring a, or its equivalent,slide-sections the groove of the slide, the .two tongue-sec- A, withtheir grooves 01,, as and for the purtions being arranged relatively toeach other pose hereinbefore set forth. and to the slide as set forth.

3. In combination with the elastic tongue SAMUEL B. ALEXANDER. shown andspecified, the sectional solid leader Attest: cl, made slightly smallerthan the former, for B. G. CONVERSE,

the more easy introduction of the same into M. M, CONVERSE.

